超滤浓缩担子菌发酵液聚合物的研究

Studies on concentration of polymers in basidiomycetes fermentation broth by ultrafiltration

利用中空纤维超滤器对灵芝发酵液中聚合物的浓缩进行了较系统的研究，并推导出该超滤器放大的适宜计算公式．结果表明：截留分子量１００００ｄ的聚砜不对称膜是适于超滤浓缩灵芝发酵液的超滤膜．适宜的超滤条件为操作压力０．２ＭＰａ，料液温度２０～３０℃，循环速度０．２２ｍ／ｓ；在此条件下超滤２００ｍｉｎ，通量及截留率分别稳定在９．１Ｌ／（ｍ２ｈ）和９６％左右，发酵液聚合物浓缩５倍以上，其收率达９２．６％．

Studies on concentration conditions of Ganoderma fermentation broth by ultrafiltration are made systematically,and useful calculation formula for the ultrafilter was presented for enlarging the ultrafilter. The experimental results indicate that concentration of Ganoderma fermentation broth by hollow fiber membrane is feasible instead of vacuum concentration under optimum conditions(Δ p =0.2 MPa, θ =20 30℃, Vc =0.22 m/s),flux( J )and cut off rate( λ )become stable after 120 min., the recovery of the polymers in Ganoderma fermentation broth is 92.6%,which is concentrated above 5 times at 200 min..